Net Nanny is a very popular and well known internet filter that offers parents the flexibility to configure the program to suit their families needs, enhanced reporting features and full remote management. It even enables parents to control what type of computer games their children can download and play, and protects against pornography sites written in foreign languages.
It has been around for many years.

With this program, parents can monitor and limit the amount of time their kids spend on the internet and set up flexible user profiles on computers that are used by both parents and children. Net Nanny has been described as a powerful and flexible tool that's easy to use and install.